MemeMachineGo!

From the A Word a Day mailing list:

Our seven-year-old daughter Ananya has developed an interest in etymology. Often she’ll interrupt her play in the backyard and peek in my downstairs study to ask about whatever word comes to her mind. Some time back she barged in with, “So how did the word dog came about?” I explained to her that the word dog came from Middle English dogge which came from Old English docga. Satisfied, she went back to her play.

I had completely forgotten about it when a few days later I overheard her
talking to her grandmother on the phone, “Amma, we got a dogga.” I was
puzzled and later asked why she said dogga instead of dog. She patiently
explained, “You know, Amma is old. That’s why I used Old English with her.”